1. allene - Noun
2. Allene - Proper noun
Allene
A female given name
(organic chemistry) Any of a class of hydrocarbons having two double bonds from one carbon atom to two others - R2C=C=CR2; especially the parent compound CH2=C=CH2 (propadiene).
(organic chemistry) Any derivative of such hydrocarbons.
Source: en.wiktionary.orgAn allene is a compound in which one carbon atom has double bonds with each of its two adjacent carbon centres. Source: Internet
The bond angle formed by the three carbons is 180°, indicating linear geometry for the carbons of allene. Source: Internet